NSSCAS Accounting (8244) common mistakes
NSSCAS Accounting (8244) · Understand the traps and how to avoid them.
When preparing a sole trader's income statement, the candidate enters the closing inventory figure as a purchase or adds it to purchases instead of deducting it from cost of sales, so gross profit is understated by twice the closing inventory value.
The candidate memorises 'cost of sales = opening inventory + purchases − closing inventory' as a string of signs without linking each sign to its physical meaning (goods still on hand are not an expense of the period). Under exam pressure the sign pattern collapses, especially when the trial balance lists inventory as a debit balance and the candidate mechanically carries the debit into the expense column.
What to do instead
Before writing any figure, sketch the inventory flow: opening inventory is sold (expense), purchases add to goods available, closing inventory remains an asset (not sold). Write the formula with a one-word justification beside each sign, then compute goods available for sale first and subtract closing inventory as a separate, labelled line. Practise three variants where closing inventory exceeds opening inventory and three where it is smaller, and check that gross profit moves in the direction you predict before marking your answer.
In the bank reconciliation, the candidate adjusts the cash book balance for items that belong only in the bank statement (unpresented cheques, uncredited deposits, bank errors) and adjusts the bank statement balance for items already in the cash book (standing orders, direct debits, bank charges, dishonoured cheques), producing two balances that will never agree.
The candidate treats the reconciliation as one undifferentiated list of differences rather than two separate ledgers with separate owners. Because both lists contain 'things that explain a difference', the candidate sorts by appearance rather than by which record is wrong.
What to do instead
Adopt a strict two-column discipline: 'cash book balance' column receives only items the business did not yet know about (bank charges, interest, standing orders, direct debits, dishonoured cheques, errors the business made); 'bank statement balance' column receives only items the bank did not yet know about (unpresented cheques, lodgements not yet credited, errors the bank made). Label each item with who is ignorant of it before writing the figure, then reconcile the two adjusted balances to a single agreed figure and state that figure as the closing balance in the updated cash book.
When correcting errors, the candidate posts the correction to the wrong side of the suspense account, or clears the suspense account with a single entry, leaving a residual balance that is then written off to the income statement rather than investigated.
The candidate learns 'suspense account = difference in trial balance' but never links each error type to whether it caused the imbalance at all. Errors of principle, omission, commission, original entry and reversal do not affect the trial balance, so no suspense entry is needed; only one-sided entries, transposition and addition errors do. Candidates also forget that the suspense account is a real ledger account that must end at nil.
What to do instead
Classify every error first into 'affects trial balance' or 'does not affect trial balance' and write the classification beside the error before drafting any journal. For each affecting error, state the missing side explicitly ('debit was posted, credit was not') so the suspense entry writes itself. After all corrections, prove the suspense account totals to zero on both sides; if it does not, re-examine each error for a double-sided correction that should not have touched suspense.
On non-current asset disposal, the candidate calculates depreciation for a full year in the year of disposal (or omits it entirely), and fails to transfer the asset's accumulated depreciation out of the provision account, so the profit or loss on disposal is wrong and the disposed asset's cost remains in the ledger.
The candidate treats disposal as a single journal (cash against asset cost) and overlooks that three accounts must be cleared: cost, accumulated depreciation, and the disposal account itself. The month-by-month depreciation policy is also often stated in the question but ignored because the candidate defaults to a whole-year charge.
What to do instead
Use a fixed four-step disposal proforma every time: (1) charge depreciation up to the date of disposal using the policy's monthly basis; (2) transfer cost to the disposal account; (3) transfer accumulated depreciation to the disposal account; (4) post proceeds and balance the disposal account to the income statement. Then check that the asset register shows the asset removed and that cost less accumulated depreciation for remaining assets equals the non-current asset figure in the statement of financial position.
In partnership appropriation, the candidate debits salaries and interest on capital to the income statement as expenses, or credits interest on drawings to the income statement as income, instead of treating all four appropriations as divisions of profit within the appropriation account.
Salaries and interest look like ordinary expenses and income, so the candidate applies familiar sole trader logic. The candidate also confuses the appropriation account (a distribution of profit) with the income statement (a measure of profit), which are separate statements even though they are presented consecutively.
What to do instead
State the principle before calculating: profit for the year is measured first and is unaffected by how it is shared; appropriations only divide that profit. Build the appropriation account in a fixed order (profit for the year, add interest on drawings, less salaries, less interest on capital, less interest on drawings if treated as a charge, residual shared in profit-sharing ratio) and check that the total of partners' shares equals profit for the year. Remember interest on drawings is income to the partnership, so it is added, not deducted.
On a partner's admission or retirement, the candidate revalues assets or records goodwill in the revaluation account but then allocates the resulting gain or loss using the new profit-sharing ratio instead of the old one, or omits the retiring partner's share of goodwill altogether.
The candidate focuses on the new agreement (new ratio, new capital) and applies it retrospectively to adjustments that belong to the period before the change. The timing logic - adjustments relate to the old partners because they owned the assets when the value arose - is not made explicit in most textbook layouts.
What to do instead
Write the date of change at the top of the page and draw a vertical line: everything to the left of the line uses the old ratio, everything after uses the new. Revaluation gains and losses and goodwill adjustments are pre-change items, so allocate them in the old ratio. For goodwill on admission, credit old partners in old ratio and debit the incoming partner; for retirement, debit continuing partners in their new ratio (or in the gaining ratio) and credit the retiring partner, then settle the retiring partner's account.
When recording an issue of shares, the candidate credits the full proceeds to share capital and ignores the share premium account, or records a bonus (capitalisation) issue as a cash receipt and increases total equity.
The candidate treats all share proceeds as capital and has no mental model of the components of equity. Bonus issues are especially confusing because they look like a share issue but involve no cash and no change in total equity, only a transfer between reserves.
What to do instead
For every share issue, split the proceeds: nominal value times number of shares to share capital, the excess to share premium. For a bonus issue, write 'no cash, no change in total equity' at the top of the answer and record only a transfer from reserves (share premium or retained earnings) to share capital at nominal value. After any equity transaction, prove that total equity equals the previous total plus any cash raised, so a bonus issue leaves the total unchanged.
In ratio analysis, the candidate computes a ratio correctly but then interprets it in isolation - for example, declaring a rise in the current ratio to be an improvement without checking inventory and receivables turnover, or calling a fall in the gross margin a pricing problem without considering cost of sales composition.
Ratio questions reward calculation, so candidates spend their time on arithmetic and leave one-line comments. They also lack a structure for interpretation, so comments default to 'increased, therefore better' rather than linking the ratio to the underlying business cause.
What to do instead
For every ratio, write three sentences in a fixed pattern: what the ratio measures, what the movement means in terms of business activity, and one limitation or alternative explanation. Cross-check related ratios in pairs - current ratio against inventory days and receivables days, gross margin against mark-up and cost of sales, return on capital employed against asset turnover and operating margin. Where the question gives comparative figures, always compare and never state a single-year ratio as a conclusion.
In marginal costing, the candidate values closing inventory including fixed production overhead, or treats fixed costs as product costs when computing contribution, so contribution and profit under the two costing methods are identical and the reconciliation of the difference is missing.
The candidate has practised absorption costing more and defaults to it. The distinction between product cost and period cost is a definitional point that is easily lost when the question supplies a full absorption cost per unit and invites its use.
What to do instead
Under marginal costing, include only variable production costs in product cost (direct materials, direct labour, variable overhead) and treat fixed production overhead as a period cost written off in full. Compute contribution as sales less variable cost of sales, then deduct all fixed costs. When a question asks for both methods, calculate the profit difference as the change in inventory units times fixed overhead per unit and show that reconciliation as a separate line, so the two profits cannot accidentally coincide.
In a limiting-factor or make-or-buy decision, the candidate ranks products by contribution per unit rather than contribution per unit of the scarce resource, or includes apportioned fixed overhead and sunk costs in the relevant cost of making.
Contribution per unit is the figure most recently calculated, so it is reused without asking whether units are the constraint. Candidates also treat all fixed costs as relevant because they appear in the absorption cost card, ignoring that apportioned overhead does not change with the decision.
What to do instead
Name the limiting factor explicitly at the top of the answer and compute contribution per unit of that factor (per machine hour, per kilogram, per labour hour) before ranking. For make-or-buy and accept-or-reject decisions, list only future, incremental cash flows: avoidable costs are relevant, apportioned fixed overhead and already-incurred costs are not. State the opportunity cost of using the scarce resource internally as a cost of making, then compare total relevant cost of making with the buy price.